| Hans Watzek Poplars and Clouds [Camera Work, no. 13, pl. 09] 1906 (photogravure) Photogravure 8 5/16 × 5 1/4 ins (21.1 × 13.3 cm) (image) 12 × 8 1/4 ins (30.5 × 21 cm) (sheet) Philadelphia Museum of Art From the Collection of Dorothy Norman, 1973, Accession Number: 1973-267-381 LL/72491
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